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module Propellor.Property.Mount where
import Propellor.Base
import Utility.Path
type FsType = String -- ^ type of filesystem to mount ("auto" to autodetect)
type Source = String
-- | Lists all mount points of the system.
mountPoints :: IO [FilePath]
mountPoints = lines <$> readProcess "findmnt" ["-rn", "--output", "target"]
-- | Finds all filesystems mounted inside the specified directory.
mountPointsBelow :: FilePath -> IO [FilePath]
mountPointsBelow target = filter (\p -> simplifyPath p /= simplifyPath target)
. filter (dirContains target)
<$> mountPoints
-- | Filesystem type mounted at a given location.
getFsType :: FilePath -> IO (Maybe FsType)
getFsType mnt = catchDefaultIO Nothing $
headMaybe . lines
<$> readProcess "findmnt" ["-n", mnt, "--output", "fstype"]
-- | Unmounts a device, lazily so any running processes don't block it.
umountLazy :: FilePath -> IO ()
umountLazy mnt =
unlessM (boolSystem "umount" [ Param "-l", Param mnt ]) $
errorMessage $ "failed unmounting " ++ mnt
-- | Unmounts anything mounted inside the specified directory.
unmountBelow :: FilePath -> IO ()
unmountBelow d = do
submnts <- mountPointsBelow d
forM_ submnts umountLazy
-- | Mounts a device.
mount :: FsType -> Source -> FilePath -> IO Bool
mount fs src mnt = boolSystem "mount" [Param "-t", Param fs, Param src, Param mnt]
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